Fuel-handling devices



Aug. 27, 1963 E. R. SCHNEIDER FEL-HANDLING DEVICES Filed Nov. l, 1961 2 Sheets-Sheet 1 Aug. 27, 1963 E. R. SCHNEIDER FUEL-HANDLING DEVICES 2 Sheets-Sheet 2 Filed NOV. l, 1961 mn Nm 3,102,152 FUEL-HANDLING DEVICES Edgar R. Schneider, St. Louis, Mo., assigner to Fue @ontrols Corporation, Manchester, Mo., a corporation of Missouri Fin-,a Nov. 1, 1961, ser. No. 149,444 t1 ciaims. (ci. 2er- 41) .This invention relates to improvements in fuel-handllng devices. More particularly, this inventiony relates to improvements in devices that inject fuel into the air stream of an engine. A i

It is therefore an object of the present invention to provide an improved device that injects fuel into the a1r stream of an engine. i

This invention is a continuation-in-part ofthe invention disclosed and claimed in my co-pending patent application Serial No. 1,258 for Fuel-Handling Devices which was tiled January 8 1960, now abandoned.

It is desirable to use a positive pressure to introduceY fuel into the air stream of an engine rather than to rely upon the ability of that air stream to aspirate the fuel from jets mounted in that air stream. In recognition of that fact, a number of devices have been proposed which would introduce fuel into the air stream of an engine under a positive pressure. However, several of those devices tended to flood theengine during the starting of the engine. Any such oodingis objectionable, and it is avoided by the fuel-handling device provided by the present invention. It is therefore an object of the present invention to provide a device that introduces fuel into the air stream of an engine by means of a positive pressure and yet avoids flooding of that engine.

It is important that a device which introduces yfuel 'into the air stream of an engine be capable of providing an accelerator pump action. Such action is needed to assure the supplying of sufficient fuel to the engine to enable that engine to apply the power needed to accelerate or to overcome increased loads. For example, an accelerator pump action is needed when the engine is to be speeded up or is to be subjected to a heavy additional load. The present invention provides a fuel-handling device that has an accelerator pump action; andv it is therefore an object of the present linvention Vto provide a device that can introduce fuel into the air stream of an engine by means of a positive pressure and that provides an accelerator pump action. v

It is important that a device which introduces fuel into the air stream of an engine have a metering system to regulate the fuel when the engine is idling, and that it also have a second metering system to regulate the fuel when the engine is running. Furthermore, it is important that the two metering systems Vbe capable of individual adjustment. The present invention provides a device that can introduce fuel into the air stream of an engine by means of a positive pressure, and that has individually different and individually adjustable idling and running systems. Y y

Other and further objects and advantages of the present invention should become apparent from an examination of the drawing and accompanyingdescription.

In the drawing and accompanying description, a pre-' ferred embodiment of the present/invention is shown and described but it is to be understood that the drawing and accompanying description are for the purpose of illustration only and do not limit the invention and that the invention will be deiined by the appended claims.

In the drawing,

FIG. l is a longitudinal section through a fuel-handling device that is made in accordance with the principles and teachings of the present invention., and it shows -,iazisfz Patented Aug. 27,k 1963 ICC ,n

the components of that device in their normal, at-rest positions,

FIG. 2 is a Vertical section through the venturi ring Vof an engine,

FIG. 3 is another longitudinal section through the device of FIG. 1, and itshows the components of that device in their running positions, and

FIG. 4 is a sectional view through the device of FIGS. 1 and 3, and it is taken along the plane indicated by the line 4-4'in'FlG. 3.

Referring to the drawing in detail, the numeral-1 0 genj erally denotes the yhousing for a fuel-handling device that is made in accordance with the Aprinciples and teachings of the present invention. That housing is generally prismatic in elevation and in plan. An elongated recess 12 is provided in the upper part of that housing adjacent the right-hand end of that housing, and that recess opens to the upper face of that housing. A cylindrical bore is provided in the lower part of the` housing 16, and that bore communicates with the recess 12.

lAv bracket plate 14 rests upon the Iupper face of the housing 10, and that bracket plate overlies the recess 12. That bracket plate has a generally circular recess 13 in the upper face thereof, and an opening 15 extends downwardly through that bracket plate from that recess. The opening 15 communicates With the recess 12 in the housing '10. vWhere the housing 1t) is narrow, the sides of the bracket plate 14 may project beyond the sides of that housing. The bracket plate 14 has an upwardlyprojecting cylindrical boss 20 adjacent the right-hand end thereof. That boss has a threaded recess 22 on the bottom thereof, has a threadedrecess 23 in the top thereof, and has a passage 24 connecting those recesses. The diameter of the passage 24 is smaller than the diameterv of either of theA recesses 22 and 23. The bracket plate 1-4 hasa downwardly-dependingpivot studl 16 adjacent the left-hand end thereof, and ythat pivot stud extends into there'cess v12. Ay' horizontally-directed pivot 18 is supportedby the pivot stud 1-6 adjacent the lower end of that stud. i

A cylinder 25 has a threaded upper end andphas a `recess 27 in the bottom thereof. v A passage '29 is providedat'the centerof the cylinder 25, and that passage coacts with the'recess 27` to form a seat 26. Ports 31 arev provided in the side walls of the cylinder 25, and those ports extend radially outwardly from the recess `27. The threaded upper ,end of lthe cylinder 25 Afits into the recess 22 in the bracket plate 14; and when that threaded upper end is within that recess, the passage 29 is aligned with the passage 24. i,

A' flexible diaphragm 28 of circular configuration overlies the portions .of the bracket plate 14 which define the recess 13. '\Consequently, that diaphragm constitutes a exible closure for that recess. A verticallydirected rod 30 is secured to the diaphragm 28 by having the upper end thereof reduced in diameter, extended.

\ `an, opening, notshown, in an elongated leverv 32y whichV is rotatably mounted onthe pivot 18. A shallow groove is provided inthe rod 30, adjacent the bottom thereof, and that groove accommodates a hairpin-like fastener 36; and that fastener underlies the lever 32. An upwardly extending abutment 34 is provided on the right-hand end of the lever 32, and that abutment is in register with, and can extend part way into, the recess 27 of the cylinder.,25. That abutment holds a ball 35 in the recess 27,y `and it can move upwardly to move that ball into engagement with the .seat 26 to prevent the v flow of fuel through the passages 24 and 29 into the recess 27.

A helical compression spring 38 is telescoped around the rod 30; and its upper end bears against the cupshaped washer that abuts the lower face of Vthe diaphragm 28. The lower end of the spring 38 bears against the upper face of the lever 32 and urges that lever against the fastener 36. The spring 38 and the fastener 36 permit ready rotation of the lever 32 relative to the rod 30 while avoiding lost motion between that rod and that lever.

A generally cup-shaped bracket 40 is mounted above the diaphragm 28, and that bracket preferably is circular in configuration. The bracket 40 has a horizontally-directed ilange that overlies and engages the outer portions of the diaphragm 2S. Fasteners 42' extend downwardly through the flange -of the bracket 40 and through the outer portions of the diaphragm 28, and then seat in threaded openings in the bracket plate 14. Those fasteners fixedly secure the diaphragm 28 between the bracket plate 14 and the bracket 40 and provide an air-tight engagement between the diaphragm 28 and the bracket plate 14 and between that bracket plate and the housing l10. The cupshaped bracket 40 has a threaded passage 44 adjacent the center thereof, and that passage accommodates a lthreaded plug 46. That plug has a recess in the under side thereof which accommodates the upper end of a helical compression spring 47. The lower end of that spring bears against .the cupeshaped washer at the upper face of the diaphragm 28. A slot will preferably be provided in the upper end of the plug 46 to accommodate a screw driver; and that screw driver can be used to rotate the plug 46 relative to lthe bracket 40' and thereby adjust the force which the spring 47 will apply to the diaphragm 2S. n

A tube 48 has a threaded lower end, and that lower end extends into the threaded recess 23I 'of the cylindrical boss 20 on the bracket plate 14. The other end of the tube 48 will be connected to .the outlet of the fuel pump of the engine. j

The recess 12, the bracket plate 14, the diaphragm 28, the lever 3,2, the ball 35, the bracket 40, and the springs 38 and 47 are comparable .to corresponding parts in my Letters Patent No. 2,774,374 for Plulsation Smoothing Valve. Those parts regulate the pressure on the fuel within the recess 12;, and thereby contribute to the operation of the fuel-handling device provided by the present invention, .but they are not per se a part of that invention.

The lower end of the cylindrical bore 50 is contiguous with :a large recess 52, and that recess opens to the bottom face of the housing 10. The recess 52 will preferably be cylindrical in configuration. A cylindrical insert 54 is dimensioned to fit within the Ibore 50 with a press fit; and that insert has a recess 56 extending upwardly from the bottom thereof. A reduced diameter passage 58 extends upwardly from the upper end of the recess 56, and that passage and that recess coact to dene a seat 60. The passage 58 opens into a threaded recess 62 which is larger in diameter than fis the passage 58; the diameter of the recess 62 generally approximating the diameter of 'the recess 56 in the lower portion 'of the cylindrical insent 54. A retainer 67, as -for example a with a number of inwardly-directed fingers, is iset in the recess 62; and that retainer underlies and 'supports a ball 65. 'Ilhe threaded recess 62 also accommodates a threaded cage 64, and that cage has a frusto-conical seat 66 adjacent the top thereof. That seat 66 can be engaged by the Iball 465 to prevent movement of fuel upwardly through the passage 58. The ball 65 will normally rest upon the retainer 67 and be below, and out of engagement with, the seat 66; but that ball can respond to any upward movement of fuel through the passage 58` to engage the seat 66 and thereby prevent any further such movement.

The numeral 68 denotes a valve element which has a frusto-conical upper end. That upper end can engage the seat 60 and keep fuel Ifrom passing downwardly through the passage 58, or that upper end can move downwardly away from that seat to permit fuel to pass downwardly through the passage 58 and enter the recess 52. The lower end of the valve element `68 rests upon the upper end of a rod 76, and that rod extends upwardly through a ilexible ldiaphragm 70. rPhe upper end of the rod 76 has a reduced diameter portion; and that reduced diameter portion extends upwardly through a cup-shaped ywasher and through the diaphragm 70 and through an upper oup-shaped washer and is then staked or otherwise secured to that upper washer. The reduced diameter portion of the rod 76 projects a short distance above the top of the upper cupashaped lwashed. The outer portions of the diaphragm 78 underlie those portions of the housing 10 which define the recess 52.

A cupdike -bracket 72, that is preferably circular in plan, is provided with a horizontally directed ange; and that dlange underlies the outer portions of the diaphragm 70. Fastenens 73 ext-end upwardly through the flange of -t'he bracket 72, extend upwardly through openings in the outer portions of the diaphragm 70, and seat in threaded openings in the housing '10. Those fasteners ixedly secure the bracket 72 to the housing 10; and those fasteners enable that bracket to hold the diaphragm 70 in sealing engagement with the housing 10, and those fasteners also Ihold the flange of that bracket in sealing engagement with the outer portions lof the diaphragm 70.

The bracket 72 has a yvertically-directed passage 74 through it, and :a bushing 75 is located within the passage '74. The rod 76 extends through and is guided by the bushing 75, and that rod is freely movable relative to y -that bushing. A flange or plate 78 is provided at the bottom of the rod 76, and that llange or plate is disposed a short distance below the bottom of the passage 74 in the bracket 72. An L-shaped outlet fitting 82 is provided on the bracket 4'72, and that outlet fitting has a passage Athrough it which communicates with the space defined by the bracket 72 and fthe lower face of the diaphragm 70. A tube 84 extends from the outlet fitting 82 to the venturi ning 150 of FIG. 2 which has the lower end thereof :secured to the intake manifold of the engine.

A helical compression spring 77 surrounds the portion of the rod 76 intermediate the passage 74 of bracket 72 and the cup-shaped washer at the lower face of -the diaphragm 70. That spring biases the rod 76 upwardly relative to the bracket 72, and it will normally cause that rod to hold the valve element `68 up in engagement with the seat `60. However, that spring can yield to permit movement of the rod 76 downwardly and thereby permit movement Iof the valve element 68 downwardly to the position lshown by FIG. 3. 'Ilhe engagement between the rod 76 andthe bushing 75 in the passage 74 of bracket 72 will be close enough to limit in-'leakage of air but will not be so tight that it will prevent ready movement of thatl rod relative to lthat bushing.

The numeral 86 denotes a pivot bracket which is carried by the housing 10, and la pivot 88l is carried by that pivot bracket adjacent the lower end thereof. A lever 90 is rotatably supported by the pivot 88, and that lever extends to the left from the pivot 88. The lever 90 has a lot 92 therein, as shown by FIG. 4, and that `slot accommodates the lower end of the rod 76 but is smaller than the ilange or plate 78 The upper end of the rod 76 will be telcscoped through the slot 92, through the bushing 75, and through the spring 77 before it passes through the cup-:shaped washers and the diaphragm 70. The lever 90 has a downwardly-extending, rounded protuberance 100, and that protuberance is initially spaced above, but can lbe moved downwardly into engagement with, the flange or plate 78 on the bottom of the rod 76.

The numenal 94 denotes ya pivot bracket that extends upwardly from the upper face of the (housing 10', and that bracketis adjacent the left-hand side of the cupshaped bracket 40. A horizontally-directed pivot 96 is supported by the brachet 94, and Ithat pivot rotatably supports a lever 98. That lever will be suitably connected to the accelerator pedal or to the hand throttle of the engine with which the lfuel-handling vdevice of F IGS. l and 3 is used. The lever 93 has a rounded protuberance 1M projecting downwardly therefrom at a point to the left of the pivot 96. That lever has a lever 104 rotatably secured to it by the pin joint 102; and that pin joint is located [intermediate the pivot 96 and the rounded protuberance 101. The lower end of the lever 104 is 'pivotally connected to the left-hand end of the lever 90 by a pin joint 106.

rllhe numeral 103 denotes a generally frusto-conical recess in the housing adjacent the left-hand end of the upper portion of that housing. A exible diaphragm 110 overlies and closes the upper end of the recess 10S; and the outer portions of that diaphragm are overlain by a horizontally-directed ange on a cup-shaped bracket 112. That flange clamps those portions o-f the diaphragm 110, which extend outwardly beyond the periphery of the recess 103, to the housing 10; and. fasteners 114 extend downwardly through that flange vand through those portions of the diaphragm 110 to seat in threaded openings in the housing 10. The bracket 112 has a passage 116 through it, and that passage has a bushing t117 disposed within it. An elongated rod 120 extends upwardly through a hup-shaped washer at the lower face of diaphragm 110, through that diaphragm, through a oupshalped washer at the fupper face of that diaphragm, and then through the bushing 117 within passage 116. The rod 120 will be staked or otherwise secured to the cupshaped washers and will thereby be secured to the `dia.- phragrn 110. A flange or plate 122 is suitalbly fixed to the upper end of the rod 120; and la `helical compression spring 1-13 surrounds the rod 120 and extends between the lower hace. of that disc or plate and the upper face of the bracket 112. That spring biases the rod 120 and the diaphragm 110 upwardly; but that spring can yield to permit downward movement of that rod and diaphragm. Such downward movement will occur whenever the lever 98 is rotated in the counter clockwise direction.

The lower end of the rod 120 has a truste-conical portion 124, and that portion is disposed within a recess 126 in the lower left-hand portion of the housing 10. That recess is formed by la tool that cuts upwardly from the bottom face of the housing 10 and the lower end of that recess is threaded to receive a plug 127. That plug make a liquid-tight connectionwith the housing 10 to seal the lower end of the recess 126. A passage 128 eX- tends upwardly from the recess 126 and communicates with the recess 108, and a seat 130 is defined by the junction of passage 128 with recess 126. That seat can be engaged by the rfrusto-conical lower portion 124 lof the rod 120, as shown by FIG. l, and that seat can coact with that lower portion to prevent the llow of fuel downwardly from the recess 108 into the recess 126. However, the frusto-oonical lower portion 124 can be moved downwardly relative to the seat 130 to permit the flow of fuel downwardly chrom the recess 103 through the passage 128 to the recess 126; and the distance which the rod 120 is moved downwardly will determine the rate at which the fuel Acan flow downwardly lfrom the receSS 108 into the recess 126.

The numeral 132 denotes a passage which extends from the recess 52 to the recess 126; land that passage has an onset 134 intermediate the ends thereof. That offset forms 1a seat 136; and a threaded recess is in reg'ster with that offset. An idling control 137 is mounted in that threaded recess; and that idling control has a frustoconical upper end that is readily 'adjustable relative to the seat 136. The idling control 137 can be rotated relative to the threaded recess, by a screwdriver, to set the rate at which fuel is supplied to the engine forl idling purposes.

An L-shaped passage 133 extends upwardly from. the passage 132, Aat a point intermediate the recess 52 and the offset 134; and that passage extends to the recess 10S. A passage 138 extends to the left from the recess 126, and that passage communicates with a threaded relcess 139 at the left-hand end of the housing 10. One end of a tube 140 extends into the recess 139, and that tube extends to a U-shaped tube y141 adjacent the venturi ring 150 of the engine. A butterfly valve 152 is mounted on a rotatablev shaft 154 below the level of the narrowest cross section of the ring 150; and that valve will move in response to movement of the accelerator pedal or of the hand throttle of the engine. The upper end of the tube 141 opens into the ring 150 above the level of the butterfly valve 152, and the lower end of that tube opens into the ring -150 below the level of thatvalve. When the butterfly valve 152 is close to its closed position, air passing through the venturi ring 150 will lay-pass that valve by passing through the tube 141.

The fact that both the lever 98 and the butterfly valve `152 are connected to the accelerator pedal or hand throttle of the engine means that both that lever :and that butterfly valve will move when that accelerator pedal or hand throttle is moved. The angular extent of the movement of the butterfly valve 152 will be several times greater than the angular extent of the movement of the lever 98, but 1an appropriate linkage can be used to provide the requisite movements of that butterfly valve and of that lever. The dotted line 160 on Sheet l of the drawing schematically represents such a linkage 4and thereby indilcates that when the butterfly valve 152 is rotated in the counter clockwise direction the lever 98 will also be rotated in that direction. i

The normal, at reist positions of the various components Iof the duel-handling device lare shown in FIG. l. The spring l118 holds the cfrusto-concial lower portion 124 of the rod '120 up in engagement with the seat 130, the spring 77 holds the valve element 68 in engagement with the seat 60, and the pressure on the fuel in recess 12 acts [upon the diaphragm 2S to cause the llever 32 and its abutment 34 to hold the ball 35 against the seat 26. That ffuel was supplied to the recess 12 by the -fuel pump of thev engine, and that fuel will hold the diaphragm in raised position until the valve element 68 is permitted to move downwardly. The idling control 137 has its frustoconical upper end spaced [from the seat 136. The flange or plate 78 |on the lower end of the rod 76 is spaced a short distance from the rounded protuberance on the lever 90, as shown by FIG. l.

rllo start the engine, the operator will press down slightly on the accelerator pedal or will move the hand throttle la short distance, thereby causing the lever 98 to rotate a short distance in the counter clockwise direction. Such rotation will enable the protubenance 101 on the lever 9S to move the rod 120 downwardly a short distante and will also enable the protuberance 100 on the lever 90 t0' move downwardly a short distance. The downward movement of the rod will move the diaphragm 110 downwardly a short distance; and that movement will cause that diaphragm to [force a quantity of fuel downwardly from the recess 103 past the frusto-conical portion 124, and that @fuel will cause a corresponding amount of fuel to issue from the tube and enter the tube 141. That fuel will mix with and be carried away by the air that ny-passes the butterfly valve 152, by passing through the tube 141, and be drawn to the intake manifold of the engine. The downward movement of the protuberance 100 on the rod 90 will not, at this time, cause that protuberance to engage the liange 78. However, if the engine fails to start, and if further priming fuel is needed, the operator can move the lever 98 down `a distance somewhatgreater than one-half of the total length of movement of said lever; and the resulting downward movement of the rod 76 will permit the valve element 68 to move downwardly away from the seat 60. Such movement or the valve element 68 will relieve the pressure within the recess '12. Thereupon the spring 47 will rotate the lever 32 downwardly, and that rotation will permit the ball 35 to move downwardly away from the seat 26.

As soon as the engine starts turning over, the operator can release the pressure on the laccelerator pedal or can return the hand throttle to its closed position. The lever 98 will no longer hold the rod 120 in lowered position, but the reduced pressure at the intake manifold of the engine will be communicated to the under face of the diaphragm 70 by the venturi ring 150 and the tube 84', and it will cause lthat diaphragm to move the rod 76 downwardly and permit the valve member 68 to move downwardly. Consequently, as long as. the engine is idling, the diaphragm 70 will be in lowered position and will hold the rod 76 down to permit the valve element 68 to be below and out of engagement with the seat 60. Fuel will `be delivered to the passage 24 by the fuel pump and the tube 48, `and that fuel will pass downwardly through the passage 29 and outwardly through the ports 31 into the recess 12. That fuel will then move downwardly through the passage 58 past the valve element 68, and then will flow through passage 132 past idling control 137, through recess 126 and passage 138, and then through tube 140 to the tube 141. The rate of flow of that fuel will be regulated by the idling control 137, and that fuel will be caused to flow smoothly by the pressureregulating action of the diaphragm 28 and ball 35. The fuel will be introduced under pressure into the air stream that passes through the by-pass tube 141 and then passes to the intake manifold.

When it is desired to accelerate the engine or to enable it to match a heavy load, the lever 98 will be rotated in the counter clockwise direction. As that lever so rotates, the rounded protuberance 101 thereon will engage the flange 122 `at the top of the rod 120 and move that rod downwardly, and it will also move the diaphragm 110 downwardly. The downward movement of the diaphragm 110 will provide an accelerator pump action by forcing a quantity of fuel to pass downwardly through the passage 128 and to move to the 'tube 141. Th-at quantity of fuel will not be able to move back up into the recess 12 because the ball 65 and the seat 66 serve -as a check valve to prevent such movement. Consequently, the diaphragm 110 will enable the engine to operate smoothly during the transition from idling to running operation. The speed at which the engine will operate will principally be determined by the setting of the frusto-conical portion 124 relative to the seat 130; and this, despite the fact that fuel will also be supplied through the passage 132 and `the offset 134.

As the 4accelerator pedal or hand throttle is progressively opened, Ithe pressure at the intake manifold will rise; yand at some position of that pedal or throttle, when the lever 98 has been moved a distance greater than one half of the total length of movement of said lever, the reduced pressure at the under side of the diaphragm 70 Will be too small to overcome the fonce of the spring 77. That `spring will tend to restore the flexible diaphragm 70 to the position shown in FIG. 1, but the rounded protuber-ance 100 on the lower face of lever 90 will, at that time, engage the flange 78 on the rod 76 and hold that rod in lowered position. As a result, a full flow of fuel downwardly through the passage 58 will be assured.

As long as the pedal or throttle is set in open position, fuel will flow to` the tube 141 under the force applied by the fuel pump, and Ithat fuel will mix with the air that flows downwardly through the venturi ring 150, as indicated by the arrow in FIG. 2. If the engine is to be decelerated, the frusto-conical portion 124 will be permitted Ito move upwardly and engage the seat 130; but fuel will continue to flow past the idling control 137 and keep the engine idling. At such time, the pressure at the intake manifold will again decrease; and although the protuberance 100 will have moved upwardly, the reduced pressure adjacent the lower face of the diaphragm 70 will keep that diaphragm in the lowered position shown in FIG. 3. lf the engine is to be accelerated to a still faster rate of operation, the lever 98 will be moved further in the counter clockwise direction; and `as it moves, it will increase 'the spacing between the seat 130 and the frustoconical lower portion 124 of the rod 120. That lever will also cause the diaphragm Ito provide an additional accelerator pump acti-on.

The normally-'closed valve element 68 is important because it serves as a pressure-controlled shut-o valve. Such a valve is important in minimizing the risk of flooding during the starting of the engine.

The fuel-handling device provided by the present invention can `be connected to the venturi ring of any engine. Hence, it has far more versatility than does a fuelhandling device that is usable with just one carbureting device.

The diaphragm 110 will act to smooth out any pulsations ion the fuel introduced into the recess 108 by the passage 133. That diaphragm will do so by yielding in the upward direction as the pressure increases and by subsequently restoring itself when 'the pressure returns to normal. The yielding and restoration of the diaphragm 110 will not affect the position of the rod 120 because `that rod will be held by the protuberance 101 on lever 98.

Whereas the drawing and accompanying description have shown and described 'a preferred embodiment of the presen-t invention, it should be apparent to those skilled in the art that various Vchanges may be made in the form of the invention without affecting the scope thereof.

What I claim is:

ml. A fuel-handling device that can introduce fuel under pressure into an air stream and that comprises a housing, an inlet for said housing that is vadapted to receive pressurized fuel, an outlet for said housing that is connectable .to the passage through which said air stream passes, a recess in said housing that is intermediate said inlet and said outlet of said housing, a flexible diaphragmthat is exposed to the pressure on fuel in said recess and that is adapted to be flexed by said pressure, said flexible diaphragm constituting .a flexible closure for said recess, a seat intermediate said inlet for said housing and said recess, a valve member that is movable into engagement with said seat to prevent flow of fuel from said inlet for said housing to said recess and that is movable out of engagement with said seat to permit flow of fuel from said inlet for said housing to said recess, a second seat intermediate said recess and said outlet for said housing, a second valve member that is movable into engagement with said second seat to prevent flow of fuel from said recess to said outlet for said housing and that is movable out of engagement with said second seat to permit flow of fuel from said recess to said outlet for said housing, a second recess in said housing that is connectable to said passage, a second flexible diaphragm that has one surface thereof exposed to the pressure in said second recess and that has the opposite surface thereof exposed to the pressure in said passage, said second flexible diaphragm constituting a flexible closure for said second recess, a member that is movable by said second flexible diaphragm and that can cause movement of the rst said valve member relative to the first said seat, a spring biasing said second flexible diaphragm to move said movable member to cause the first said valve member to engage the first said seat and thereby prevent the flow of fuel from said inlet for said housing to the rst said recess, said pressure in said passage being adapted to cause said second flexible diaphragm to overcome the bias of said spring and to move in a predetermined direction to move said movable member and thereby permit the first said valve member to move away from lthe first said seat and thereby permit fuel to flow from said inlet for said housing to the first said recess, a lever that -is movable in one direction to move said second flexible diaphragm in said predetermined direction to move said movable member and thereby permit the first said valve member to move away from the first said seat and thereby permit fuel to flow from said inlet for said housing to the first said recess and that is movable in the opposite direction to permit said second liexible diaphragm to move oppositely to said predetermined direction, a lostmotion :connection between said second flexible diaphragm .and said lever that enables said pressure in said passage to cause movement of said second flexible diaphragm in said predetermined direction even though said lever has not moved, said second valve member and the rst said llexible diaphragm being connected together for conjoint movement, a second lever that is movable in a certain direction to move said second valve member away from said second seat and to move the first said liexible diaphragm and thereby force a quantity of fuel to move past said second valve member and past said second seat to said outlet for said housing, a connection between said levers whereby the first said lever will move in said one direction whenever said second lever is moved in said certain direction, said second valve member bein-g a frustoconical metering rod, an idling passage that by-passes the first said recess and the first said seat, and an adjustable idling screw in said idling passage, the llexing of the first said flexible diaphragm by said pressure on said fuel in the first said recess tending to minimize pulsations of the fuel issuing from said outlet for'said housing.

2. A fuel-handling device that can introduce fuel under pressure into an air stream and that comprises a housing, an inlet for said housing that is adapted to receive pres-y surized fuel, an outlet for said housing that is oonnectable to the passage through which said air stream passes, a recess in said housing that is intermediate said inlet and said outlet of said housing, a flexible diaphragm that is exposed to fuel in said recess, aseat intermediate said inlet for said housing and said recess, a valve member that is movable into engagement with sai-d seat to prevent ow of fuel from said inlet for said housing to sm'd recess and that is movable out of engagement with said seat to lever that is movable in a certain direction to move said second valve member away from said second seat and to move the iirst said flexible diaphragm and thereby force a quantity of .fuel to move past said second valve member and past said second seat to said outlet for said housing and a connection between said levers whereby the first said lever -will move in said one direction whenever said second lever is moved in said certain direction.

3. A fuel-handling device that can introduce fuel under pressure into an air stream and that comprises a housing, an inlet for said housing that is adapted to receive pressurized fuel, an outlet for said housing that is connectable to the passage through which said stream passes, a recess in said housing that is intermediate said inlet and said outlet of said housing, a movable element that is exposed to fuel in said recess, a seat intermediate said inlet for said housing and said recess, a valve member that is permit llow of fuel from said inlet for said housing to said recess, a second seat intermediate said recess and said outlet for said housing, a second valve member that is movable into engagement with said second seat to prevent ow of fuel from said recess to said outlet for said housing and that is movable out of engagement with said second seat to permit ow of fuel from said recess to said outlet for said housing, a second ileXi-ble diaphragm that has one surface .thereof exposed to the pressure in said passage, a member that is movable by sai-d second iiexible diaphragm and that can cause movement of the first said valve member relative to the rst said seat, a spring biasing said second exible diaphragm to move said movable member to cause the rst said valve member to engage the first said seat and thereby prevent the flow of fuel from said inlet for said housing to the rst said recess, said pressure in said passage being adapted to cause said second flexible diaphragm to overcome the bias of said spring and to move in `a predetermined direction to move said movable member and thereby permit the rst said valve member to move away from the rst said seat and thereby permit fuel to flow from said inlet for said housing to the first said recess, a lever that is movable in one direction to move said second flexible diaphragm in said predetermined 'direction to move said movable member and thereby permit the iirst said valve member to move away from the rst said seat and thereby permit fuel to iiow from said inlet for said housing to the first said recess and that is movable in the opposite direction to permit said second flexible diaphragm to move oppositely to said predetermined direction, a lost-motion connection between said second flexible diaphragm and said lever that enables said pressure in said passage to canse movement of said second flexible diaphragm in said predetermined direction even though said lever has not moved, said second valve member and the first said flexible diaphragm being connected together for conjoint movement, a second movable into engagement with said seat to prevent flow of fuel from said inlet for said housing to said recess and that is movable out of engagement with said seat to permit flow of fuel from said inlet for said housing to said recess, a second seat intermediate said recess and said outlet for said housing, a second valve member that is movable into engagement with said second seat to prevent ow of fuel from said recess to said outlet for said housing and that is movable out of engagement with said second seat to permit llow of fuel from said recess to said outlet for said housing, a second movable element that has one surface thereof exposed to the pressure in said passage, Ia member that is movable by said second movable element .and that can causermovement of the rst said valve member relative to the first said seat, a spring biasing said second movable element to move said movable member to cause the rst said valve member to engage the lirst said seat and thereby prevent the flow of fuel from said inlet for said housing to the first said recess, said pressure in said passage being adapted to cause said second movable element to overcome the bias of said spring and to move in a predetermined direction to move said movable member and thereby permit the irst said valve member to move away from the lirst said lseat and thereby permit fuel'to flow from said inlet for said housing to the first said recess, said second v-alve member and the first said movable element being movable together, and a lever that -is movable in a certain direction to move said second valve member away from said second seat and to move the first-said movable element and thereby force a quantity of fuel to move past sa-id second valve member and past said second seat to said outlet for said housing.

4. A fuel-handling device that can introduce fuel under pressure into an air stream and that comprises a housing,

an inlet for said housing that is adapted to receive pressurized fuel, `an outlet for said housing that is connectable to the passage through which said air stream passes, a seat `intermediate said inlet and said outlet for said housing, `a valve member that is movable into engagement with said seat to prevent llow of fuel from said inlet past said seat and that is movable out of engagement with said seat to permit llow of fuel past said seat, a second seat intermediate the lirst said seat and said outlet for said housing, a -second valve member that is movable into engagement with said :second seat to prevent liow of fuel past said second seat and that is movable out of engagement with said second se at to permit flow of fuel past said second seat, a lever that is movable in one direction to enable the first said valve member to move away from the rst said seat, la second lever that is movable in a certain direction to move said second valve element away from said second seat, and a connection between said levers whereby the first said lever will move in said one direction whenever said second lever is moved in said certain direction.

5. A fuel-handling device that can introduce fuel under pressure into an air stream and that comprises a housing, an inlet for said housing that is adapted to receive pressurized fuel, an outlet for said housing that is connectable to the passage through which said air stream passes, a recess in said housing that is intermediate said inlet and said outlet of said housing, a llexible diaphragm exposed to fuel in said recess, a seat intermediate said inlet for said housing and said recess, a valve member that is movable into engagement with said seat to prevent ow of rfuel from said inlet for said housing to said recess and that is movable out of engagement with said seat to permit flow of fuel from said inlet for said housing to said recess, a second seat intermediate said recess and said outlet for said housing, a second valve member that is movable into engagement -with said second seat to prevent flow of fuel from ,said recess to said outlet for said housing and that is movable out of engagement with said second seat to permit ow of fuel from said recess to said outlet for said housing, a lever that is movable in one direction to facilitate movement of the first said valve element away from the rst said seat, a second lever that is movable in a certain direction to move said second valve element away from said second seat, and a connection between said levers whereby the first said lever will move in said one direction whene-ver said second lever is moved in said certain direction, said second valve member and the rst said flexible diaphragm being connected together for conjoint movement, whereby opening movement of said second lever causes said flexible diaphragm to provide an accelerator pump action.

6. A fuel-handling device that can introduce fuel under pressure into an air stream and that comprises a housing, an inlet for said housing that is adapted to receive pressurized fuel, an outlet for said housing that is connectable to the passage through which said air stream passes, a recess in said housing that is intermediate said inlet and said outlet of said housing, a pressure-responsive member that is exposed to the pressure on fuel in said recess and that is adapted to have a portion thereof move in response to said pressure, said pressure-responsive member constituting a yieldable closure for said recess, a seat intermediate said recess and said outlet for said housing, a Valve member that is movable into engagement with said seat to prevent flow of fuel from said recess to said outlet for said housing and that is movable out of engagement with said seat to permit flow of fuel from said recess to said outlet for said housing, said valve element and said portion of said pressure-responsive member moving together, and a member that is movable in a certain direction to move said valve member away from said seat and to move said movable portion of said pressure-responsive member and thereby force a quanity of fuel to move past said valve member and past said seat to said outlet for said housing.

7. A fuel-handling device that can introduce fuel under pressure into an air stream and that comprises a housing, an inlet for said housing that is adapted to receive pressunized fuel, an outlet for said housing that is connectable to the passage through which said air stream passes, a recess in said housing that is intermediate said inlet and said outlet of said housing, a movable member that is eX- posed to fuel in said recess, a seat intermediate said recess and said outlet for said housing, a valve member that is movable into engagement with said seat to prevent flow of fuel from said recess to said outlet for said housing and that is movable out of engagement with said seat to permit flow of fuel from said recess to said outlet for said housing, said valve element and said movable member moving together, and a member that is movable in a certain direction to move said valve member away 4from said seat and to move said movable member and thereby force a quantity of fuel to move past said valve member and past said seat to said outlet for said housing.

8. A 4fuel-handling device that can introduce fuel under pressure into an air stream and that comprises a housing, an inlet for said housing that is adapted to receive pressurized fuel, an outlet for said housing that is connectable to the passage through which said air stream passes, an idling passage in said housing that receives fuel from said inlet for said housing and that delivers fuel to said outlet for said housing, and a running passage in said housing that receives fuel from said inlet for said housing and that delivers fuel to said outlet for said housing, said idling passage having an idling screw therein intermediate the ends thereof, said running passage having a main fuelmetering valve member, said idling screw and said fuelmetering valve member being individually movable.

9. A fuel-handling device that can introduce fuel under pressure into an air stream and that comprises a housing, an inlet for said housing that is adapted to receive pressurized fuel, an outlet for said housing that is connectable to the passage through which said lair stream passes, an idling passage .in said housing that receives fuel from said inlet for said housing and that delivers fuel to said outlet for said housing, and a running passage in said housing that receives fuel from said inlet for said housing Iand that delivers fuel to said outlet for said housing, said running passage having a main `fuel-metering valve member and a movable member that moves with said fuel-metering valve member, said movable member causing fuel to move past said main fuel-metering valve member and thereby provide an accelerator pump action.

l0. A fuel-handiing device that can introduce fuel under pressure into an air stream and that comprises a passage through which said air stream passes, a valve that is disposed within said passage and that is movable to close or to open said passage, a by-pass that extends from and communicates with the atmospheres in said passage that are ahead of and that are behind said valve, said by-pass having a cross section that is small compared to the cross section of said passage, an inlet for said by-pass that is intermediate the ends of said by-pass, and a housing that is lconnected intermediate said inlet for said by-pass and a source of pressurized fuel, said housing having a valve therein that is openable to permit fuel under pressure to pass to and to enter said inlet for said passage.

ll. A fuel-handling device that can introduce fuel under pressure into an air stream and that comprises a housing, an inlet for said housing that is adapted to receive pressurized fuel, an outlet for said housing that is connectable to the passage through which said air stream passes, a fuel passage in said housing that receives fuel from said inlet for said housing and that conducts said fuel to said outlet for said housing, a second fuel passage in said housing that receives fuel from said inlet for said housing and that conducts said fuel to said outlet for said housing, a metering element in the first said passage intermediate the ends of said passage, a second metering element in said second passage intermediate the ends of said second passage, the first said metering element being adjustable but being Xed during normal operation of said fuel-handling device, said second metering element being movable relative to said second seat during normal operation of said fuel-handling device.

l2. A fuel-handling device that can introduce fuel under pressure into an 'air stream and that comprises a housing, an inlet for said housing that is adapted to receive pressurized fuel, an outlet for said housing that is connectable to the pass-age through which said air stream passes, a recess in said housing that is intermediate said inlet and said outlet of said housing, ia movable rnembei that is exposed to fuel in said recess, a seat intermediate said recess and said outlet for said housing, a valve member that is movable into engagement with said seat to prevent ow of fuel from said recess to said outlet for said housing and that is movable out 'of engagement with said seat to permit flow of fuel from said recess to said outlet for said housing, a check valve intermediate said recess and said inlet for said housing Ithat opens to permit fuel to llow from said inlet toward said recess but that closes to prevent llow of fuel from said recess to said inlet for said housing, said valve element and said movable member moving together, and a member that is movable in a certain direc- 13 tion to move said Valve memberaway from said seat and to move said movable member and thereby force a quan'- tity of fuel to move past said valve member and past said seat to said outlet for said housing, said check valve being adapted to close during the enforced movement of said quantity of fuel. f

13. A fuel-handling device that can introduce rluel under pressure intov an air stream and that comprises a housing, an inlet for said housing that is adapted to receive pressurized fuel, an outlet for said housing that'is connectable to the passage through which said air stream passes, a seat intermediate said inlet and said outlet for said housing, a valve member that is movable into engagement with said seat to prevent flow of fuel from said inlet past said seat and lchat is movable but of engagement with said seat to permit llow of fuel past said seat, a second seat intermediate the 4first said seat and said outlet for said housing, a second vvalve member Ichat is movable into engagement with said second seat to prevent flow of fuel past said second seat and that is movable out of engagement with said second seat to permit llow of fuel past said second seat, a lever that is movable in one direction to enable the lirst said valve member to move away trom the iirst said seat, a movable element that is exposed to the pressure in said passage and that responds to reductions in said pressure to permit the iirst said valve member to move avv-ay from the iirst said seat, and a lost-motion connection between said movable element and said lever that enables reductions in saidpressure in said passage to cause greater movement of the first said valve member than said lever may require.

14. A fuel-handling device that can introduce fuel under pressure into an air stream and that comprises a housing, van inlet for said housing that is adapted to receive pressurized fuel, an :outlet forsaid housing that is 14 sure in said passage through which said air stream passes. 16. A fuel-handling ydevice that lcan introduce fuel under pressure into yan air stream and that comprises a housing, an inlet for said housing that is adapted to receive pressurized fuel, an outlet for said housing that is connectable to the passage through which said air stream passes, a seat intermediate said inlet and said outlet for said housing, a valve member that is movable into engagement with said seat to prevent ilow of fuel from said inlet past said seat and that is movable out of engagement with said seat to permit ilow of fuel past said seat, a second seat intermediate the tirst said seat and said outlet for said housing, a second valve member that is movable into enl gagement with said second seat to prevent iiow of fuel connectable to the passage through which said air stream v passes, a throttle in said passage, a seat intermediate said inlet and said outlet for said housing, a valve member that is movable into engagement with said seat yto prevent flow of fuel from said inlet past said seat and that is movable out of engagement with said seat to permit flow orf fuel past said seat, a lever that is movable in one direction to enable said valve member to move away from said seat, a movable element that is exposed to the pressure in said passage and that responds to redutions in said pressure to permit said valve member to move avvay from said seat, and a lost-motion connection between said movable element and said lever, said valve member being biased toward said seat and being in engagement with said seat whenever said throttle is in its normal position, said lever permitting said valve element lto remain in engagement with said seat during the first part of the movement of said throttle, said movable element thereafter responding to said pressure in said passage to move and thereby permit said valve member to move away from said seat, said lever and said movable element subsequently .enacting to hold said valve member away from said seat. v

115. A fuel-handling device that can introduce fuel under pressure into an air stream and that Acomprises a housing, an inlet for said housing that is adapted to receive pressurized fuel, an outlet for said housing that is connectable to the passage through which said air stream passes, an idling passage in said housing that receives fuel from said inlet for said housing and that delivers fuel to said outlet for said housing, and a running passage in said housing that receives fuel from said inlet for said housing and that delivers fuel to said outlet for said housing, said idling passage having an idling screw therein intermediate the ends thereof, said running passage having :a main fuelmetering valve member, a seat intermediate said inlet for said housing and said idling and running passages, a 'valve member that normally engages said seat, and an actuator that is movable to `free said valve member for movement away from said seat to permit fuel to ow from said inlet to said lidling and running passages, said actuator being manuallyaoperable or operated by reductions in the prespast said secon-d seat and that is movable out of engage-A ment with said second seat to permit ilow of fuel past said second. seat, a lever that is movable in one direction to enable the first said valve member to move away from the first said seat, a second lever that is movable in a icertain direction to move said second valve element away from said second seat, and a connection between said levers whereby the rst said lever will move in said one direction whenever said second lever is moved in said certain direction, said iirst said lever being initially spaced from a position in which it can enable said first said valve element to move away `from said first said seat whereby said second lever will move said second valve element away from said second seat before said iirst said lever enables said iirs-t said valve element to move away from said first said seat, th-e movement of said second valve element prior to the movement of said first said valve element enabling fuel to ilow to said outlet while said rst said valve element is in engagement with said first said seat.

17. A fuel-handling device that can introduce fuel under pressure into an air stream and that comprises a housing, an inlet for said housing that is adapted to receive pressurized fuel, lan outlet for said housing that is connectable to the passa-ge through which said air stream passes, a recess in said housing that is intermediate said inlet and said outlet of said housing, a flexible diaphragm exposed to fuel in said recess, a seat intermediate said inlet for said housing and said recess, a valve member that is movable into engagement with said seat to prevent iiow of fuel from said inlet for said housing to said recess and that is movable out of engagement with said seat to permit flow of fuel from said inlet for said housing to said recess, a second seat intermediate said recess and said outlet for said housing, a second valve member that is movable into enga-gement with said second seat to prevent flow of liuel .from said recess to said outlet for said housing and that is movable out ofrengagement with said second seat to permit ilow of fuel from said recess to said outlet for said housing, a lever that is movable in one direction to facilitate movement of the -iirst said valve element away from the iirst said seat, a second lever that is movable in a certain direction to move said second valve element away from said second seat, anda connection between said levers whereby the lirst said lever will move in said one direction Whenever said second lever is moved in said certain direction, said second valve member and the iirst said flexible diaphragm being connected together for conjoint movement, whereby opening movement of said second lever causes said ilexible diaphragm to pro- 'vide an accelerator pump action, said iii-st said lever being initially spaced from a position in which it can facilitate movement of said first valve element away from said first said seat whereby said second lever will move said second valve element Way from said second seat before said iirst said lever enables said flrst said valve element to move away from said lirst said seat.

References Cited in the le of this patent UNITED STATES PATENTS 2,250,932 Kittler July 29, \l9'4l 2,502,679 Stanley Apr. 4, 1950 2,650,081 Rockwell Ang. 25, 11953 

1. A FUEL-HANDLING DEVICE THAT CAN INTRODUCE FUEL UNDER PRESSURE INTO AN AIR STREAM AND THAT COMPRISES A HOUSING, AN INLET FOR SAID HOUSING THAT IS ADAPTED TO RECEIVE PRESSURIZED FUEL, AN OUTLET FOR SAID HOUSING THAT IS CONNECTABLE TO THE PASSAGE THROUGH WHICH SAID AIR STREAM PASSES, A RECESS IN SAID HOUSING THAT IS INTERMEDIATE SAID INLET AND SAID OUTLET OF SAID HOUSING, A FLEXIBLE DIAPHRAGM THAT IS EXPOSED TO THE PRESSURE ON FUEL IN SAID RECESS AND THAT IS ADAPTED TO BE FLEXED BY SAID PRESSURE, SAID FLEXIBLE DIAPHRAGM CONSTITUTING A FLEXIBLE CLOSURE FOR SAID RECESS, A SEAT INTERMEDIATE SAID INLET FOR SAID HOUSING AND SAID RECESS, A VALVE MEMBER THAT IS MOVALBLE INTO ENGAGEMENT WITH SAID SEAT TO PREVENT FLOW OF FUEL FROM SAID INLET FOR SAID HOUSING TO SAID RECESS AND THAT IS MOVABLE OUT OF ENGAGEMENT WITH SAID SEAT TO PERMIT FLOW OF FUEL FROM SAID INLET FOR SAID HOUSING TO SAID RECESS, A SECOND SEAT INTERMEDIATE SAID RECESS AND SAID OUTLET FOR SAID HOUSING, A SECOND VALVE MEMBER THAT IS MOVABLE INTO ENGAGEMENT WITH SAID SECOND SEAT TO PREVENT FLOW OF FUEL FROM SAID RECESS TO SAID OUTLET FOR SAID HOUSING AND THAT IS MOVABLE OUT OF ENGAGEMENT WITH SAID SECOND SEAT TO PERMIT FLOW OF FUEL FROM SAID RECESS TO SAID OUTLET FOR SAID HOUSING, A SECOND RECESS IN SAID HOUSING THAT IS CONNECTABLE TO SAID PASSAGE, A SECOND FLEXIBLE DIAPHRAGM THAT HAS ONE SURFACE THEREOF EXPOSED TO THE PRESSURE IN SAID SECOND RECESS AND THAT HAS THE OPPOSITE SURFACE THEREOF EXPOSED TO THE PRESSURE IN SAID PASSAGE, SAID SECOND FLEXIBLE DIAPHRAGM CONSTITUTING A FLEXIBLE CLOSURE FOR SAID SECOND RECESS, A MEMBER THAT IS MOVABLE BY SAID SECOND FLEXIBLE DIAPHRAGM AND THAT CAN CAUSE MOVEMENT OF THE FIRST SAID VALVE MEMBER RELATIVE TO THE FIRST SAID SEAT, A SPRING BIASING SAID SECOND FLEXIBLE DIAPHRAGM TO MOVE SAID MOVABLE MEMBER TO CAUSE THE FIRST SAID VALVE MEMBER TO ENGAGE THE FIRST SAID SEAT AND THEREBY PREVENT THE FLOW OF FUEL FROM SAID INLET FOR SAID HOUSING TO THE FIRST SAID RECESS, SAID PRESSURE IN SAID PASSAFE BEING ADAPTED TO CAUSE SAID SECOND FLEXIBLE DIAPHRAGM TO OVERCOME THE BIAS OF SAID SPRING AND TO MOVE IN A PREDETERMINED DIRECTION TO MOVE SAID MOVABLE MEMBER AND THEREBY PERMIT THE FIRST SAID VALVE MEMBER TO MOVE AWAY FROM THE FIRST SAID SEAT AND THEREBY PERMIT FUEL TO FLOW FROM SAID INLET FOR SAID HOUSING TO THE FIRST SAID RECESS, A LEVER THAT IS MOVABLE IN ONE DIRECTION TO MOVE SAID SECOND FLEXIBLE DIAPHRAGM IN SAID PREDETERMINED DIRECTION TO MOVE SAID MOVABLE MEMBER AND THEREBY PERMIT THE FIRST SAID VALVE MEMBER TO MOVE AWAY FROM THE FIRST SAID SEAT AND THEREBY PERMIT FUEL TO FLOW FROM SAID INLET FOR SAID HOUSING TO THE FIRST SAID RECESS AND THAT IS MOVABLE IN THE OPPOSITE DIRECTION TO PRERMIT SECOND FLEXIBLE DIAPHRAGM TO MOVE OPPOSITELY TO SAID PREDETERMINED DIRECTION, A LOSTMOTION CONNECTION BETWEEN SAID SECOND FLEXIBLE DIAPHRAGM AND SAID LEVER THAT ENABLES SAID PRESSURE IN SAID PASSAGE TO CAUSE MOVEMENT OF SAID SECOND FLEXIBLE DIAPHRAGM IN SAID PREDETERMINED DIRECTION EVEN THROUGH SAID LEVER HAS NOT MOVED, SAID SECOND VALVE MEMBER AND THE FIRST SAID FLEXIBLE DIAPHRAGM BEING CONNECTED TOGETHER FOR CONJOINT MOVEMENT, A SECOND LEVER THAT IS MOVABLE IN A CERTAIN DIRECTION TO MOVE SAID SECOND VALVE MEMBER AWAY FROM SAID SECOND SEAT AND TO MOVE THE FIRST SAID FLEXIBLE DIAPHRAGM AND THREBY FORCE A QUANTITY OF FUEL TO MOVE PAST SAID SECOND VALVE MEMBER AND PAST SAID SECOND SEAT TO SAID OUTLET FOR SAID HOUSING, A CONNECTION BETWEEN SAID LEVERS WHEREBY THE FIRST SAID LEVER WILL MOVE IN SAID ONE DIRECTION WHENEVER SAID SECOND LEVER IS MOVED IN SAID CERTAIN DIRECTION, SAID SECOND VALVE MEMBER BEING A FRUSTOCINCIAL METERING ROD, AND IDLING PASSAGE THAT BY-PASSES THE FIRST SAID RECESS AND THE FIRST SAID SEAT, AND AN ADJUSTABLE IDILING SCREW IN SAID IDLING PASSAGE, THE FLEIBLE OF THE FIRST SAID FLEXIBLE DIAPHRAGM BY SAID PRESSURE ON SAID FUEL IN THE FIRST SAID RECESS TENDING TO MINIMIZE PULSTIONS OF THE FUEL ISSUING FROM SAID OUTLET FOR SAID HOUSING. 